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Acari, Hydrachnidia) Using Fourier Transform Infrared Spectroscopy (FTIR) Methods

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Acari, Hydrachnidia) Using Fourier Transform Infrared Spectroscopy (FTIR) Methods F. Aşçı et al. / Hacettepe J. Biol. & Chem., 2019, 47 (4), 431-435 Hacettepe Journal of Biology and Chemistry Research Article journal homepage: www.hjbc.hacettepe.edu.tr Chemical Taxonomy Applications of Some Water Mite Species (Acari, Hydrachnidia) Using Fourier Transform Infrared Spectroscopy (FTIR) Methods Fourier Dönüşümü Kızılötesi Spektroskopisi (FTIR) Yöntemlerini Kullanarak Bazı Su Akar Türlerinin (Acari, Hydrachnidia) Kimyasal Taksonomisi Uygulamaları Ferruh Aşçı1 , Gülderen Uysal Akkuş2 , Nazife Alpaslan1 , Gamze Kübra Çetin1 1Department of Molecular Biology and Genetics, Afyon Kocatepe University, Afyonkarahisar, Turkey. ²Department of Chemistry, Afyon Kocatepe University, Afyonkarahisar, Turkey. ABSTRACT his study employed water mite (Acari, Hydrachnidia) species collected from a natural lake water environment. These Tspecies included Hydrodroma despiciens, Eylais infundibulifera, Hydryphantes flexiosus, Georgella helvatica, Hygrobates nigromacutlatus, Hydryphantes thoni ve Torrenticola bevirostris. Chemical analyses of these species were conducted using the Fourier infrared spectrophotometer (FTIR) technique. Solid phase IR spectra were made individually for each species. The data obtained for all species were examined graphically and were identified in four different spectral regions. Finally, the spectrum frequency ranges of these species were determined. The functional groups OH, C-H, C=O, C-O, and C-N were observed. The vibrational frequencies of each species studied were determined. When evaluating the results of the spectroscopic analysis, the range of the spectrum of these species was shown to be similar to one another; however, peak intervals were different for each species. Key Words Water mites, acari, Hydrachnidia, infrared spectroscopy, chemical taxonomy. ÖZ u çalışmada, doğal göl suyu ortamından toplanan su kenesi (Acari, Hydrachnidia) türleri kullanılmıştır. Bu türler Hydrod- Broma despiciens, Eylais infundibulifera, Hydryphantes flexiosus, Georgella helvatica, Hygrobates nigromacutlatus, Hydryphantes thoni ve Torrenticola bevirostris’dir. Bu türlerin kimyasal analizleri, Fourier kızılötesi spektrofotometre (FTIR) tekniği kullanılarak yapıldı. Katı faz IR spektrumları her tür için ayrı ayrı yapıldı. Tüm türler için elde edilen veriler grafiksel olarak incelendi ve dört farklı spektral bölgede tanımlandı. Son olarak, bu türlerin spektrum frekans aralıkları belirlendi. Fonksiyonel gruplar OH, C = H, C = 0, C = 0 ve C = N gözlendi. Çalışılan her türün titreşim frekansları belirlendi. Spektroskopik analiz sonuçları değerlendirilirken, bu türlerin spektrum aralığının birbirine benzer olduğu ancak, en yüksek aralıkların her tür için farklı olduğu gösterilmiştir. Anahtar Kelimeler Su keneleri, acari, Hydrachnidia, infraraed spektroskopi, kimyasal taksonomi Article History: Received: Dec 26, 2018; Revised: Jul 5, 2019; Accepted: Oct 2, 2019; Available Online: Nov 1, 2019. DOI: https://doi.org/10.15671/hjbc.646737 Correspondence to: F. Aşcı, Department of Molecular Biology and Genetics, Afyon Kocatepe University, Afyonkarahisar, Turkey. E-Mail: [email protected] 432 F. Aşçı et al. / Hacettepe J. Biol. & Chem., 2019, 47 (4), 429-433 INTRODUCTION • O-H and N-H stretching vibration frequency absorp- large number of studies have been conducted on tions are seen at 3700-3000 cm-1. A water mites that are commonly found in marine -1 and inland waters. Water mite species (Acari: Hydrach- • The 1950-1550 cm region: this region is called the nidia) belong to 57 families, 400 genera and approxi- carbonyl (C-O) double bond region. mately 6000 species [1-6]. Water mites are important • The 1500-700 cm-1 region: This region is called the ecologically as bioindicator organisms. Molecular and fingerprint region. Most of the single bond absorption chemical studies have been conducted on this group peaks are collected in this region. Esters (C-O-C) ethers [7- 14]. In terms of solving systemic problems and the (R-O-R) inorganic phosphates, inorganic sulfates, inor- level of understanding of the phylogenetic relationships ganic carbonates, and inorganic nitrates are observed encountered between water mites, chemical techniqu- in this region (Figure 1) [4]. es have recently been employed [7, 8, 10, 11]. The data obtained by this method serve as a significant contribu- IR (infrared spectroscopy) has recently become one of tion for systematizers and taxonomists. Considering the the molecular methods used in invertebrate animals for continuing systematic discussion of some water mite taxonomic purposes. This study is the first to identify species, it is important to note that the molecular and functional groups in water mite species using IR. The chemical methods currently being employed by rese- infrared technique was used for the first time in Acari- archers indicate certain and clear results. dae in 1989 by Leal et al. In this study, Leal and collea- gues isolated rosefuran and perylene derivatives from The FTIR technique used in this study provides determina- Tyrophagus neiswanderi (Acariformes, Acaridae) speci- tion of functional groups’ (OH, C-H, C=O, C-O, C-N, etc.) es. The study described these natural compounds using structure by measuring the vibrational energy of molecules IR and other spectroscopic techniques and compared within the structure. This method is generally used to de- them with synthetic ones [17]. termine the structure of chemical compounds, particularly organic compounds, alongside other spectrophotometric Another study by Leal et al. (1989) isolated a novel methods (NMR, Mass, UV, etc.) [15-16]. monoterpene 2(E)-(4-methyl-3-pentenyl) butanediol (α-acari dial) from another Acari species, Tyrophagus Infrared spectroscopy is a spectroscopy-based technique pernicious, and determined the structure of this com- that absorbs the infrared rays of the material under study. pound by spectroscopic methods (GS-FTIR, MS). Subse- All molecules, except for homo-nuclear (N , O , Cl ) mol- 2 2 2 quently, a series of reactions on the part of this com- ecules, have a unique infrared spectrum. The IR spectrum pound was carried out to obtain the E and Z isomers of is generally divided into four regions: 3700-2700 cm-1 (X- this α-acari dial compound. The study also compared H); 2700-1850 cm-1 (triple bonds); 1950-1550 cm-1 (double the spectroscopic results of these natural monoterpe- bonds) and 1550-600 cm-1 (except for X-H, single bonds). ne derivatives with that of synthetic ones [17]. A similar • The 3700-2700 cm-1 region: absorption peaks in this study by Hiraoka and colleagues (2001) obtained a mix- region generally result from hydrogen vibrations. ture of two monoterpenes from Histiogaster sp. A096 Figure 1. Functional group regions [4]. F. Aşçı et al. / Hacettepe J. Biol. & Chem., 2019, 47 (4), 429-433 433 (Acari: Acaridae). They then elucidated their structure 100 mg of anhydrous KBr (potassium bromide) was ad- by GC/MS, GC/FTIR, UV and 1H NMR spectroscopy ((2E, ded to roughly 5 mg of water mite species (Hydrodroma 4E) - and (2Z, 4E)-3,7-dimethyl-2,4,6-octatrienals) [18]. despiciens, Eylais infundibulifera, Hydryphantes flexio- In a study conducted by Sato et al. (1993) researc- sus, Georgella helvatica, Hygrobates nigromacutlatus, hers extracted a new salicylaldehyde derivative with Hydryphantes thoni, Torrenticola bevirostris) by weig- a yield of 37% by extracting Dermatophagoides pte- hing each species with a precision scale. The mixture ronyssinus, a type of mite, with hexane [19]. In anot- of water mites and potassium bromide was placed into her study, a new monoterpene lactone was obtained a mortar and thoroughly crushed for homogenization. from Tyrophagus putrescentiae, a type of mold fun- This mixture was pressed into thin transparent discs gus by Morino and coworkers (1997). The researchers and then analyzed by FTIR (Perkin Elmer Spectrum BX). noted the chemical name of this lactone as (E)-2-(4’- The results of the analysis were graphically evaluated. methyl-3’-pentenylidene)-4-butanol and assigned it the β-acarolide trivial name [20]. There is no information in RESULTS the literature about the use of this method in relation to water mites. In the present study, the similarities or When the results obtained from samples of seven wa- differences between species belonging to different fa- ter mite species were examined, four functional groups milies were evaluated using a systematic approach. in the spectrum were observed. These functional gro- ups were: (1) functional group (OH, NH) in the range of MATERIALS and METHODS 3600-3200 cm-1; (2) functional group (C-H) in the range of 2900-2850 cm-1; (3) functional group (C-C, C=O, C=N) The water mites used in the study were collected from in the range of 1780-1650 cm-1; (4) functional group (C- Karamık Lake (Afyonkarahisar-Turkey) from May-August O, C-N, C-S) in the range of 1200-400 cm-1 (Figure 1). All 2015. Samples were identified in the laboratory under a of these functional groups were observed in all species. microscope. The samples were washed with pure water and dried in sterile petri dishes at room temperature; Figure 2. FTIR analysis of water mites species Hydrodroma despiciens (1), Eylais infundibulifera (2), Hydryphantes flexiosus (3), Geor- gella helvatica (4), Hygrobates nigromacutlatus (5), Hydryphantes thoni (6) and Torrenticola bevirostris (7). 434 F. Aşçı et al. / Hacettepe J. Biol. & Chem., 2019, 47 (4), 429-433 The first functional group is the OH and NH range. It is DISCUSSION observed that the similarity rate among the six species studied
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